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ext4: clean up the flags passed to __blockdev_direct_IO

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For extent-based files, you can perform DIO to holes, as mentioned in
the comments in ext4_ext_direct_IO.  However, that function passes
DIO_SKIP_HOLES to __blockdev_direct_IO, which is *really* confusing to
the uninitiated reader.  The key, here, is that the get_block function
passed in, ext4_get_block_write, completely ignores the create flag
that is passed to it (the create flag is passed in from the direct I/O
code, which uses the DIO_SKIP_HOLES flag to determine whether or not
it should be cleared).

This is a long-winded way of saying that the DIO_SKIP_HOLES flag is
ultimately ignored.  So let's remove it.

Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Jeff Moyer 2012-03-05 10:19:52 -05:00 committed by Theodore Ts'o
parent f70486055e
commit 93ef8541d5
1 changed files with 1 additions and 1 deletions
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2
fs/ext4/inode.c
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@ -2941,7 +2941,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
ext4_get_block_write,
ext4_end_io_dio,
NULL,
DIO_LOCKING | DIO_SKIP_HOLES);
DIO_LOCKING);
if (iocb->private)
EXT4_I(inode)->cur_aio_dio = NULL;
/*